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- Element-wise vector-vector multiplication (MKL or IPP)

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hyouklee

Beginner

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07-21-2010
06:55 PM

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Element-wise vector-vector multiplication (MKL or IPP)

I'm looking for a function in MKL or IPP or other related libraries

that does element-wise multiplication on two vectors.

[a1, a2, a3, ...] * [b1, b2, b3, ...] = [(a1*b1), (a2*b2), (a3*b3), ...]

The elements will be floating point numbers (doubles or floats).

I searched the MKL and IPP documentations,

but could not find the function that does this operations.

Is there a function for this?

Thanks.

HyoukJoong.

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Shane_S_Intel

Employee

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07-21-2010
07:48 PM

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Intel MKL contains these functions which should correspond to what you want to do - see the MKL reference manual Vector Math Library section.

**Fortran: **

call vsmul( n, a, b, y )

call vdmul( n, a, b, y )

call vcmul( n, a, b, y )

call vzmul( n, a, b, y )

**C: **

vsMul( n, a, b, y );

vdMul( n, a, b, y );

vcMul( n, a, b, y );

vzMul( n, a, b, y );

Gennady_F_Intel

Moderator

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07-21-2010
09:29 PM

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Intel IPP offers the same functionality but only with C API.

IPP offers not-in place and in-place operations for floating and integer data with and without scaling.

See the details into the IPP Reference Manual, Signal Processing,

Arithmatic Functions section.

The examples of APIimmediately below shows the not-in-place operations on floating point data:

IppStatus ippsMul_64f(const Ipp64f* pSrc1, const Ipp64f* pSrc2, Ipp64f* pDst, int len);

IppStatus ippsMul_32fc(const Ipp32fc* pSrc1, const Ipp32fc* pSrc2, Ipp32fc* pDst, int len);

--Gennady

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